Gov. Eddie Calvo is among seven Republican governors backing President Donald Trump's nomination for the Nobel Peace Prize, citing what they called Trump's "transformative efforts to bring peace to the Korean peninsula."

Governors aren't listed among those who can officially make Nobel nominations, based on the organization's website. There are 56 governors of U.S. states and territories.

In 2016, North Korea issued threats to launch missiles toward Guam, warning that "reckless moves" by the U.S. would compel Pyongyang to take action. In the midst of the threats, Trump called Calvo and assured him, "We are with you a thousand percent. You are safe."

In a May 14 letter to Norwegian Nobel Committee Chairman Berit Reiss-Andersen, Calvo and the other governors wrote Trump has achieved an unprecedented victory for global peace and security, referring to efforts to denuclearize North Korea.

"The president's firm stance against nuclearization, coupled with his willingness to engage one-on-one with Pyongyang, has succeeded in opening new avenues of cooperation, friendship and unity between the two Koreas — and the rest of the world," the governors wrote.

The letter follows a similar move by 18 U.S. House of Representatives Republicans, who nominated Trump on May 2 for the award amid preparations for a historic summit with North Korea’s Kim Jong Un.

Trump on April 18 announced that CIA Director Mike Pompeo met with Kim in North Korea ahead of an anticipated meeting between the two nations. Three days later, on April 21, North Korea announced the suspension of its nuclear testing program. On April 27, Kim met with South Korean President Moon Jae-in in a landmark summit.

The governors also cited the CIA director's return from Pyongyang with three Americans.

"After nearly two decades of gridlock and global anxiety surrounding North Korea's nuclear program, we are now, at last, on the precipice of peace," the governors wrote.